Synergistic effect of CoCr2O4 and polyaniline nanohybrid catalyst for boosting the OER activity

1. A. Abdullah, M.A. Johar, A. Waseem, I.V. Bagal, M.A. Hassan, J.K. Lee, S.W. Ryu, Unbiased solar water splitting of GaN photoanodes with Au nanoparticles supported by plasmon-assisted hot-carrier transfer. Mater. Sci. Eng. B 275, 115514 (2022). https://doi.org/10.1016/J.MSEB.2021.11551410.1016/J.MSEB.2021.115514 ↗

2. Y.H. Wang, B. Li, Y.F. Cui, Y. Du, Z.W. Yu, L.Y. Zhang, S.D. Jiang, Catalytic mechanism of nanocrystalline and amorphous matrix in Fe-based microwires for advanced oxidation. Adv. Funct. Mater. 35, 2425912 (2025). https://doi.org/10.1002/adfm.20242591210.1002/adfm.202425912 ↗

3. X. Wei, Y. Jiao, X. Zou, Y. Guo, W. Li, T. Ai, P vacancy-induced electron redistribution and phase reconstruction of CoFeP for overall water splitting at industrial-level current density. Inorg. Chem. Front. 12, 2678–2690 (2025). https://doi.org/10.1039/D4QI03351E10.1039/D4QI03351E ↗

4. M.A. Bhatti, S. Kumar, A. Tahira, A.L. Bhatti, Z.A. Ujjan, M.A. Jakhrani, Z.H. Ibupoto, Advanced NiCo2O4/ZnO-CuO/NF composite for high-performance asymmetric supercapacitor and efficient oxygen evolution reaction applications Adv. Compos. Hybrid Mater. 8, 148 (2025). https://doi.org/10.1007/s42114-025-01238-910.1007/s42114-025-01238-9 ↗

5. C. Zhu, Q. Shi, S. Feng, D. Du, Y. Lin, Single-Atom catalysts for electrochemical water splitting. ACS Energy Lett. 3, 1713–1721 (2018). /IMAGES/LARGE/NZ-2018-00640N_0002.JPEG. https://doi.org/10.1021/acsenergylett.8b0064010.1021/acsenergylett.8b00640 ↗

6. A. Hayat, A. Tahira, M.A. Bhatti, I. Naz, A.A. Shah, E. Dawi, Z.H. Ibupoto, Co3O4 nanoparticles synthesized with rotten-grape extract for use in supercapacitors and oxygen evolution devices. Results Eng. 24, 102922 (2024). https://doi.org/10.1002/ADVS.20210513510.1002/ADVS.202105135 ↗

7. Q. Zhang, J. Peng, S. Jiang, H. Xiong, X. Fu, S. Shang, P.C. Chen, Plasma-activated 2D CuMnO2 nanosheet catalysts with rich oxygen vacancies for efficient CO2 electroreduction. Appl. Catal. B: Environ. 371 (2025). https://doi.org/10.1016/j.apcatb.2025.12525510.1016/j.apcatb.2025.125255 ↗

8. J. Liao, C. Tang, Y. Sun, X. Wang, Y. Xiao, B. Cheng, S. Lei, Graphene oxide supported-stabilized oxygen defective CoCr2O4 for boosted bifunctional electrocatalytic oxygen evolution and urea oxidation. Fuel 381, 133313 (2025). https://doi.org/10.1016/J.FUEL.2024.13331310.1016/J.FUEL.2024.133313 ↗

9. Y.C. Liu, D. Vasu, G.L. Li, J. Jiang, T.W. Chiu, L. Fan, Z.L. Ye, W.H. Hu, W.J. Sim, T. Yonezawa, Bi-functional CoCr2O4 hollow-sphere for enhanced oxygen evolution reaction and photocatalyst for harmful environmental pollutants removal. Ceram. Int. 50, 51901–51910 (2024). https://doi.org/10.1016/J.CERAMINT.2024.03.05610.1016/J.CERAMINT.2024.03.056 ↗

10. Y. Fan, W. Wang, Y. Chen, Z. Xu, D. Cai, M. Xu, R. Tong, Cobalt-containing ZIF-derived catalysts for Zn–air batteries. Mater. Chem. Front. 8, 2394–2419 (2024). https://doi.org/10.1039/D4QM00169A10.1039/D4QM00169A ↗

11. M. Zhang, G. Jeerh, P. Zou, R. Lan, M. Wang, H. Wang, S. Tao, Recent development of perovskite oxide-based electrocatalysts and their applications in low to intermediate temperature electrochemical devices. Mater. Today. 49, 351–377 (2021). https://doi.org/10.1016/J.MATTOD.2021.05.00410.1016/J.MATTOD.2021.05.004 ↗

12. E. Mustafa, E.A. Dawi, Z.H. Ibupoto, A.M.M. Ibrahim, A. Elsukova, X. Liu, O. Nur, Efficient CuO/Ag 2 WO 4 photoelectrodes for photoelectrochemical water splitting using solar visible radiation. RSC Adv. 13, 11297–11310 (2023). https://doi.org/10.3390/CATAL1202011010.3390/CATAL12020110 ↗

13. J. Fan, X. Xiang, Y. Liu, X. Yang, N. Shi, D. Xu, C. Zhou, M. Han, J. Bao, W. Huang, Defect‐rich high‐entropy spinel oxide as an efficient and robust oxygen evolution catalyst for seawater electrolysis. SusMat. e70010 (2025). https://doi.org/10.1002/sus2.7001010.1002/sus2.70010 ↗

14. S. Garain, C. Dang Van, S. Choi, N. Dang, J.W. Ager, K.T. Nam, H. Shin, M.H. Lee, S. Garain, C. Dang Van, T.N. Dang, M.H. Lee, S. Choi, K.T. Nam, J.W. Ager, H. Shin, Hierarchical thiospinel NiCo2S4/Polyaniline hybrid nanostructures as a bifunctional electrocatalyst for highly efficient and durable overall water splitting. Adv. Mater. Interfaces. 9, 2200649 (2022). https://doi.org/10.1002/ADMI.20220064910.1002/ADMI.202200649 ↗

15. W. Yan, Z. Yang, W. Bian, R. Yang, FeCo2O4/hollow graphene spheres hybrid with enhanced electrocatalytic activities for oxygen reduction and oxygen evolution reaction. Carbon N Y 92, 74–83 (2015). https://doi.org/10.1016/J.CARBON.2015.03.02110.1016/J.CARBON.2015.03.021 ↗

16. A. Meghwar, A. Raza, H. Kumar, J. Parmar, W. Dars, R. Mangi, Z.H. Ibupoto, Utilization of coinage metals as an efficient dopant protocol for enhancing asymmetric supercapacitors and oxygen evolution reactions. Polym. Adv. Technol. 36, e70208 (2025). https://doi.org/10.1002/pat.7020810.1002/pat.70208 ↗

17. H.M. Abo-Dief, Production of oxygen via water oxidation using PANI@CuMn2O4 nanocomposite electrocatalyst for OER. Mater. Chem. Phys. 326, 129803 (2024). https://doi.org/10.1016/J.MATCHEMPHYS.2024.12980310.1016/J.MATCHEMPHYS.2024.129803 ↗

18. A. Kathalingam, S. Ramesh, H.M. Yadav, J.H. Choi, H.S. Kim, H.S. Kim, Nanosheet-like ZnCo2O4@nitrogen doped graphene oxide/polyaniline composite for supercapacitor application: effect of polyaniline incorporation. J. Alloys Compd. 830, 154734 (2020). https://doi.org/10.1016/J.JALLCOM.2020.15473410.1016/J.JALLCOM.2020.154734 ↗

19. X. Li, Y. Liu, J. Leng, Large-scale fabrication of superhydrophobic shape memory composite films for efficient anti-icing and de-icing. Sustain. Mater. Technol. 37, e00692 (2023). https://doi.org/10.1016/J.SUSMAT.2023.E0069210.1016/J.SUSMAT.2023.E00692 ↗

20. M.S. Tamboli, S.A. Patil, A.M. Tamboli, S.S. Patil, N.T.N. Truong, K. Lee, C.S. Praveen, N.K. Shrestha, C. Park, B.B. Kale, Polyaniline-wrapped MnMoO4 as an active catalyst for hydrogen production by electrochemical water splitting. Dalt Trans. 51, 6027–6035 (2022). https://doi.org/10.1039/D2DT00032F10.1039/D2DT00032F ↗

21. M. Bhushan, M. Mani, A.K. Singh, A.B. Panda, V.K. Shahi, Self-standing polyaniline membrane containing quaternary ammonium groups loaded with hollow spherical NiCo2O4 electrocatalyst for alkaline water electrolyser. J. Mater. Chem. A 8, 17089–17097 (2020). https://doi.org/10.1039/D0TA05373B10.1039/D0TA05373B ↗

22. M. Riaz, S.M. Ali, R. Alotaibi, M. Sadiq, M.A. Shakoori, Synthesis of halide perovskites binary composites with rGO and PANI for High-Performance supercapacitor electrodes. J. Inorg. Organomet. Polym. Mater. 34, 5257–5265 (2024). https://doi.org/10.1007/S10904-024-03145-W/FIGURES/810.1007/S10904-024-03145-W/FIGURES/8 ↗

23. Z. Tian, C. Zhu, J. Wang, Z. Xia, Y. Liu, S. Yuan, Size dependence of structure and magnetic properties of CoCr2O4 nanoparticles synthesized by hydrothermal technique. J. Magn. Magn. Mater. 377, 176–182 (2015). https://doi.org/10.1016/J.JMMM.2014.10.09010.1016/J.JMMM.2014.10.090 ↗

24. Y. Liu, J. Li, F. Li, W. Li, H. Yang, X. Zhang, Y. Liu, J. Ma, A facile preparation of CoFe2O4 nanoparticles on polyaniline-functionalised carbon nanotubes as enhanced catalysts for the oxygen evolution reaction. J. Mater. Chem. A 4, 4472–4478 (2016). https://doi.org/10.1039/C5TA10420C10.1039/C5TA10420C ↗

25. E.A. Dawi, M. Padervand, S. Ghasemi, S. Hajiahmadi, K. Kakaei, Z. Shahsavari, S. Karima, M. Baghernejad, M. Signoretto, Z.H. Ibupoto, A. Tahira, C. Wang, Multi-functional fluorinated NiTiO3 perovskites for CO2 photocatalytic reduction, electrocatalytic water splitting, and biomedical waste management. JWPE. 54 (2023). https://doi.org/10.1016/j.jwpe.2023.10397910.1016/j.jwpe.2023.103979 ↗

26. A. Bard, L.F.-S. Technol, undefined 1983, Electrochemical methods: fundamentals and applications, Acad. Bard, LR FaulknerSurf. Technol, 1983•academia.Edu (n.d.). https://www.academia.edu/download/50181600/0376-4583_2883_2990080-820161108-15766-55v4od.pdf. Accessed 17 Feb 2025

27. S. Gopi, A.M. Al-Mohaimeed, W.A. Al-onazi, M.S. Elshikh, K. Yun, Metal organic framework-derived Ni-Cu bimetallic electrocatalyst for efficient oxygen evolution reaction. J. King Saud Univ. Sci. 33, 101379 (2021). https://doi.org/10.1016/j.jksus.2021.10137910.1016/j.jksus.2021.101379 ↗

28. M. Mitra, C. Kulsi, K. Chatterjee, K. Kargupta, S. Ganguly, D. Banerjee, S. Goswami, Reduced graphene oxide-polyaniline composites—synthesis, characterization and optimization for thermoelectric applications. RSC Adv. 5, 31039–31048 (2015). https://doi.org/10.1039/C5RA01794G10.1039/C5RA01794G ↗

29. V. Shanmugavalli, K. Vishista, An investigation on the supercapacitive performance of CuCo2O4/Polyaniline, a nanocomposite of spinel structured transition binary metal oxide and conducting polymer, with a special focus on bonding and electron density distribution through MEM. J. Inorg. Organomet. Polym. Mater. 30, 1448–1462 (2020). https://doi.org/10.1007/S10904-019-01268-Z/TABLES/810.1007/S10904-019-01268-Z/TABLES/8 ↗

30. R. Shafique, M. Rani, K. Batool, A.A. Alothman, M.S. Saleh Mushab, A.A. Shah, A. Kanwal, S. Ali, M. Arshad, Fabrication and characterization of MXene/CuCr2O4 nanocomposite for diverse energy applications. J. Mater. Res. Technol. 24, 2668–2677 (2023). https://doi.org/10.1016/J.JMRT.2023.03.15010.1016/J.JMRT.2023.03.150 ↗

31. P. Choudhary, P. Saxena, A. Yadav, V.N. Rai, A. Mishra. Dielectric and ferroelectric properties of CoCr2O4 nanoceramics, 9 (2019). https://doi.org/10.1142/S2010135X1950015210.1142/S2010135X19500152 ↗

32. K. Shetty, L. Renuka, H.P. Nagaswarupa, H. Nagabhushana, K.S. Anantharaju, D. Rangappa, S.C. Prashantha, K. Ashwini, A comparative study on CuFe2O4, ZnFe2O4 and NiFe2O4: Morphology, Impedance and Photocatalytic studies. Mater. Today Proc. 4, 11806–11815 (2017). https://doi.org/10.1016/J.MATPR.2017.09.09810.1016/J.MATPR.2017.09.098 ↗

33. I. Šeděnková, M. Trchová, J. Stejskal, Thermal degradation of polyaniline films prepared in solutions of strong and weak acids and in water – FTIR and Raman spectroscopic studies. Polym. Degrad. Stab. 93, 2147–2157 (2008). https://doi.org/10.1016/J.POLYMDEGRADSTAB.2008.08.00710.1016/J.POLYMDEGRADSTAB.2008.08.007 ↗

34. A.N. Jarad, K. Ibrahim, N.M. Ahmed. Synthesis and characterization thin films of conductive polymer (PANI) for optoelectronic device application, AIP Conf. Proc. 1733 (2016). https://doi.org/10.1063/1.4948838/102007910.1063/1.4948838/1020079 ↗

35. A.F. Shojaei, A.R. Tabari, M.H. Loghmani, Normal spinel CoCr2O4 and CoCr2O4/TiO2 nanocomposite as novel photocatalysts, for degradation of dyes. Micro Nano Lett. 8, 426–431 (2013). https://doi.org/10.1049/MNL.2013.011410.1049/MNL.2013.0114 ↗

36. A. Goel, T.T. Mashangva, A. Garg, S. Prasher, A.K. Sharma, D. Kumar, P.E. Lokhande, M. Kumar, Synthesis of NiCo2O4/rGO/PANI ternary nanocomposite for electrochemical performance and impact of doping on pure PANI. J. Mater. Sci. Mater. Electron. 34, 1–14 (2023). https://doi.org/10.1007/S10854-023-11234-8/FIGURES/1310.1007/S10854-023-11234-8/FIGURES/13 ↗

37. M.L. Mota, A. Carrillo, A.J. Verdugo, A. Olivas, J.M. Guerrero, E.C. De la Cruz, N.N. Ramírez, Synthesis and novel purification process of PANI and PANI/AgNPs composite. Molecules 24, 1621 (2019). https://doi.org/10.3390/MOLECULES2408162110.3390/MOLECULES24081621 ↗

38. S. Gopi, K. Yun, Nitrogen-doped cerium-iron phosphide as an ultra-efficient Ru-free electrocatalyst for oxygen evolution reaction. J. Alloys Compd. 1000, 175051 (2024). https://doi.org/10.1016/j.jallcom.2024.17505110.1016/j.jallcom.2024.175051 ↗

39. Y. Duan, Z. Huang, J. Ren, X. Dong, Q. Wu, R. Jia, X. Xu, S. Shi, S. Han, Highly efficient OER catalyst enabled by in situ generated manganese spinel on polyaniline with strong coordination. Dalt Trans. 51, 9116–9126 (2022). https://doi.org/10.1039/D2DT01236G10.1039/D2DT01236G ↗

40. Y. Zou, Y. Huang, L.W. Jiang, A. Indra, Y. Wang, H. Liu, J.J. Wang, Polyaniline coating enables electronic structure engineering in Fe3O4 to promote alkaline oxygen evolution reaction. Nanotechnology 33, 155402 (2022). https://doi.org/10.1088/1361-6528/AC475C10.1088/1361-6528/AC475C ↗

41. J. Dong, Q. Yang, Q. Zhao, Z. Hou, Y. Zhou, R. Zhang. Poly(aniline-co-pyrrole)-coated Ni-doped manganese dioxide as electrode materials for supercapacitors 13 (2020). https://doi.org/10.1142/S179360472051007810.1142/S1793604720510078 ↗

42. A.M. Alenad, S. Fatima, U. Khalid, N. Bano, A.G. Abid, S. Manzoor, H.M.T. Farid, M. Messali, H.A. Alzahrani, T.A.M. Taha, Polyaniline-engineered zinc sulphide nanocomposite as a highly efficient electrocatalyst for the oxygen evolution process. J. Korean Ceram. Soc. 60, 868–880 (2023). https://doi.org/10.1007/S43207-023-00310-8/TABLES/210.1007/S43207-023-00310-8/TABLES/2 ↗

43. A.M. Karami, K. Jabbour, S. Manzoor, M.U. Nisa, M.F. Ashiq, M.N. Ansari, M.F. Ehsan, M.N. Ashiq, Fabrication of PANI supported magnesium/cobalt spinel ternary oxide as an efficient oxygen evolution reaction and removal of organic pollutant. Ceram. Int. 49, 40403–40413 (2023). https://doi.org/10.1016/J.CERAMINT.2023.10.01210.1016/J.CERAMINT.2023.10.012 ↗

44. A.M. Alenad, T.A.M. Taha, M. Abdullah, A.G. Abid, S. Manzoor, R.Y. Khosa, H.M.T. Farid, S. Trukhanov, M.I. Sayyed, D. Tishkevich, A. Trukhanov, Highly performed tungsten trioxide-polyaniline composite thin film and their accelerated oxygen evolution electrocatalyst activity. J. Electroanal. Chem. 941, 117550 (2023). https://doi.org/10.1016/J.JELECHEM.2023.11755010.1016/J.JELECHEM.2023.117550 ↗

45. S. Garain, C. Dang Van, S. Choi, T. Nguyen Dang, J.W. Ager, K.T. Nam, H. Shin, M.H. Lee, Hierarchical thiospinel NiCo2S4/Polyaniline hybrid nanostructures as a bifunctional electrocatalyst for highly efficient and durable overall water splitting. Adv. Mater. Interfaces. 9, 2200649 (2022). https://doi.org/10.1002/ADMI.20220064910.1002/ADMI.202200649 ↗